MicroPython Forum

jimmo

I don't know how to interpret that picture sorry -- doesn't have any labels.

Did changing that sleep make any difference?

jimmo

I tried it the way you did, it does change to read-only mode in micropython, but it's still writable in windows. I don't know much about Windows, but here are some pointers that might help: The pyboard makes a virtual USB device by emulating a partition table in the first block. See storage_read_bl...

jimmo

atmuc wrote: ↑
Sun Nov 15, 2020 6:18 am
I display a counter with 1 sec period.

Try using

Code: Select all

for i in range(100):
  time.sleep_ms(10)

instead of

Code: Select all

time.sleep(1)

jimmo

I used HIGH for esc and LOW for servos. What do you mean by avoid flicker ?, that at e.g. 50hz it can cause more servo vibration than at e.g. 100hz? I mean it's designed for driving dimmable LEDs, where you want to PWM in the hundreds of kilohertz. Why do you need different frequency for ESC and se...

jimmo

shaoziyang wrote: ↑
Sun Nov 15, 2020 8:51 am
I want make pybflash disk to readonly mode, what command can be used to implement this function?

os.mount() takes a `readonly` kwarg.

In boot.py you can unmount /flash and then re-mount it readonly.

jimmo

Yes, I think this is the right term for this. It doesn't send anything to the back-end until you press ENTER. Actually, I thought that the same happens with terminal emulator + screen/tio/miniterm. Doesn't it? When MP code does `sys.stdout.read(2)` and I'm pressing "x", "y", "backspace", "z" in min...

jimmo

Thanks for reporting! Raised here: https://github.com/micropython/micropython/issues/6623

jimmo

atmuc wrote: ↑
Sat Nov 14, 2020 8:00 am
Thanks. it works now. This code makes esp32 crazy. I have to erase and flush esp32 after this code run on it.

Ah yeah that definitely won't work. init() will end up calling into the software implementation (which isn't initialised). This is a bug -- I will raise it on github.

jimmo

I think this might be a question for Thonny and/or WebREPL (I was testing this with a direct VCP serial connection). See my reply on the other thread -- viewtopic.php?f=2&t=9187&p=52327#p52327

jimmo

In a terminal emulator you probably can send combinations with Ctrl -- eg. Ctrl+F should send byte 0x06 (smaller values are special for MicroPython REPL). I haven't tried it, though and it won't work in Thonny. I think laukejas is referring to https://forum.micropython.org/viewtopic.php?f=2&t=9303 ...

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